I-66 Multimodal Study Final Report - Virginia Department of ...

Multimodal PackagesCost EstimatesPackage 2 has the highest estimated cost of all the packages, as shown in Table 3.8. The highwaycost is the highest because it includes the addition of a new lane in each direction as wellas the electronic tolling cost. The majority of the transit cost is in terms of operating expenses,which will be incurred annually. Transit costs do not include additional costs associated withincreased maintenance and storage needs. Revenues may be used to defray capital and operatingcosts for both highway and transit.Table 3.8 Package 2 Cost SummaryCapital ($2011) Annual Operating ($2011)Highway $377-702 million $3 millionTransit $5 million $23 millionAppendix D provides more detailed documentation of the assumptions underlying theseestimates.Key FindingsThis package adds lane capacity and applies a pricing strategy as in Package 1. It results in thelowest amount of congested vehicle usage among the packages for the study area, reducingcongested VMT by 17 percent. It also produces the highest vehicle usage for the study area.The added capacity results in the highest person throughput at the cutlines. The additionaltransit service helps maintain the mode share, with only a slight reduction in transit modeshare for work trips with destinations in the study area.Although Package 2 was modeled with an additional lane in each direction for the entire facilityinside the Capital Beltway (I-495), an additional lane may not be warranted for the fulllength. The model showed that the highest demand in the morning peak period leveled off eastof Glebe Road. Given the demand and the traffic merge and diverge issues, the addition of alane between Glebe Road and the Dulles Connector Road could serve to best address the forecastedtravel demand developed in this scenario.The capital cost for this shorter segment, without design exceptions (i.e., compare againsthigher end figure above) was estimated as $220 million, plus the costs of tolling (addingroughly $35 million). The incremental associated highway and maintenance operating cost is$1 million per year, not including toll operating costs.3-40 I-66 Multimodal Study